Ventilation of buildings.



No. 781,644. PATENTED FEB. 7, 1905. D. FAIRBANKS. VENTILATION 0F BUILDINGS.

APPLICATION FILED 00'1.12, 1903.

vwentoz 2/91 hwooea Patented February '7, 1905.

DAVID FAIRBANKS, OF GHARLESTOWN,

NEW HAMPSHIRE.

VENTILATION OF BUILDINGS.

SPECIFICATION forming part of Letters Patent No. 781,644, dated February 7, 1905.

Application filed October 12,1903. SerialNo.1'76,690.

To (1,7/ [whom it man con/corn:

Be it known that 1, DAVID FAIRBANKS, a citizen of the United States, residing at Charlestown, in the county of Sullivan and State of New Hampshire, have invented certain new and useful lIIlplOVOlllGlltS in Ventilation of Buildings, of which the following is a specilication.

This invention aims to provide improvements in means for ventilating rooms of buildings, ships, cars, or the like.

The invention relates to the class of devices for conducting the impure or foul air at the lower portion of the room therefrom, a pcculiar form of air-flue being employed for this purpose, which, in combination with a heater smoke-flue, constitutes the invention.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result reference is to be had to the followingdescription and drawings hereto attached.

\Vhile the essential and characteristic features of the invention are susceptible of modilication, still the preferred embodiment of the invention is illustrated in the accompanying drawings, in which Figure 1 is an elevation of a heater, showing the invention used in connection therewith for the purpose of ventilating a room. Fig. 2 is a plan view of the heater, showing in dotted lines the disposal of the inner airflue. Fig. 3 is a vertical sectional view on the line X'X of Fig. 1.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

The invention is shown in connection with an ordinary heatingstove l. Adjacent the heating-stove is located the chimney 2, and a smoke pipe or flue 3 extends from the stove 1 to the chimney 2, connecting the same. The air-flue & is disposed within the chimney 2, being designed to carry the impure air out of the building or room through the chimneyopening. To convey the impure air to the air-flue at, an outer air-flue 5 extends downwardly from the stove or heater 1, the open end thereof being disposed adjacent the lower portion of the room in order that the foul air may be drawn within the air-flue to be taken off from the room. The disposal of the airflue 5 is in accord with the well-known principle that the impure constitutents of the air being of greater specilic gravity than the purer constituents descend and locate in the lower portion of a receptacle, room, or the like in which they may be found. Disposed within the smoke-flue 3 is an inner air=tlue (3, which connects the outer air-flue 5 with the air-flue a within the chimney 2, the portion of the inner flue 6 within the heater being located in the space between the top plate of the oven and the top proper of the heater and curved upon itself, so as to present sutiicient heating-surface to cause rapid and strong draft to carry the foul air to the flue T and out of the building in which the ventilating means is disposed. The portion of the inner be made in sections somewhat similar to the sections of the smoke-pipe and secured to said sections in order to provide a substantial device, so that the sections of the air-flue t) to the smoke-flue pipe or smoke-flue 3 may be combined at the same time when assembling the several parts of the invention.

An ordinary form of damper T is located within the smoke-flue 3, and a damper S is disposed within the outer air-flue 5, so that the amount of foul air passing from the room may be regulated or the damper closed and the outflow cut off entirely.

It will be understood that the air-flue 5 has the entrance-opening thereof located at any suitable point in the lower portion of the room as desirable for the purposes for which the invention is designed.

Theair-flue 6 may lead directly from the building to the open air instead of connecting with the air-flue & within the chimney, though the invention is not susceptible of the best results possible when this latter construction is utilized. lt is essential that the air-line (5 be heated in the manner described hereinbefore, and it is further important that the air-flue should be used for conveying air from the building, since should the outer air-flue be confine 6 located within the smoke-flue 3 may.

the various rooms would be conducted out of the building either directly or through the chimney or otherwise, as required. 2 5 Having thus described the invention, what is claimed as new is In ventilation of buildings, the combination of a chimney, a pipe disposed in said chimney,

nected directly to the heater and the smokefiue, so that thelatter might be used to convey impure air off, this construction would not produce the best results, in that the size of the smoke-flue and the chimney is such that the air passing therefrom would expand to an extent which would cause a perceptible decrease in the draft, so that the foul air would a heater, a smoke-pipe connecting the chim- 3 not be drawn off so quickly nor in such quanney and theheater, a pipe extending a distance tity as when the air-flue is used. outside of the heater and passing into the When the system of ventilation is used in space between the top plate of the oven and connection with buildings heated by furnaces the top proper of the heater,being turned upon using hot air, steam, orhot water, the arrangeitself in such space to present an increased 35 ment of the flue would be somewhat modified. Forinstance,a central flue might be utilized,and branch pipes extending from this flue would be connected with the various rooms which would require ventilation. The central flue heating-surface, said air-pipe extending from the space in the heater through the smoke-pipe and connected to the pipe in the chimney.

In testimony whereof I aflix my signature in presence of two witnesses.

I would be connected with the furnace extend- J DAVID FAIRBANKS. [L. s.] ing below same and upwardly and then con- Witnesses: necting with the air-flue leading into the fur- I E. L. WALKER,

nace, as described before. The foul air from J. F. ALEXANDER, Jr. 

